All's fair in love and war.
He is not one to speak up in a crowd, or one on one for that matter. Not exactly shy, just used to being swept under the carpet. Invisible, so to speak. He hates being called short, or any variation of the fact, but keeps his cool in most situations. It's hard to get him panicked, or to show much emotion at all. Or rather, it used to be.
He landed in the school with much of nothing. With no special skills other than hiking he didn't have the chance to bring much.
Thus far it's a mystery, but will come to light through the role play.